The 10 Best Breeds for Following a Scent

Did you know? Dogs have more than 200 million smell receptors in their noses—compared with only 5 million in humans. A quick sniff of another dog can tell a curious canine whether the dog is friend or enemy, whether they've met before, if the dog is spayed or neutered and male or female, and more. This keen scenting sense has gotten dogs work following their noses to everything from bombs and bodies to endangered species to bedbugs.